Difference between revisions of "Crystals in body fluids"
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*Memory | *Memory devices: | ||
**''Diamonds'' are see-through; ergo, uric acid stones not seen on KUB. | |||
**Calcium oxalat'''e''' = '''e'''nvelope, uric aci'''d''' = '''d'''iamond. | |||
*Uric acid crystals: usually dissolve in formulin... but do not dissolve in alcohol.<ref>WG. 8 January 2010.</ref> | *Uric acid crystals: usually dissolve in formulin... but do not dissolve in alcohol.<ref>WG. 8 January 2010.</ref> | ||
Revision as of 04:53, 14 October 2010
This article deals with crystals in body fluids.
Joint crystals
Types:[1]
- Gout = needle-shaped, negatively birefringent, yellow when aligned.
- Pseudogout = rhomboid-shaped, positively birefringent, blue when aligned.
Notes:
- Pseudogout also known as CPPD = calcium pyrophosphate dehydrogenase.
- Memory device: ABC+ = aligned blue is calcium & cuboid - positively birefringent.
Images:
- Crystals - schematic (stpetes.org) from Microscopic Examination for Crystals in Synovial Fluid (stpetes.org).
- Blue rhomboid CPPD crystals (med.utah.edu).
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Urine crystals
Types:
- Envelope shape (calcium oxalate).
- Diamond shape (uric acid).
- Coffin-lid shape (struvite).
- Hexagonal shape (cysteine).
Notes:
- Memory devices:
- Diamonds are see-through; ergo, uric acid stones not seen on KUB.
- Calcium oxalate = envelope, uric acid = diamond.
- Uric acid crystals: usually dissolve in formulin... but do not dissolve in alcohol.[2]